Improvement in fastenings for casters, knobs



J; an. THINNES & C. SCHUELER. l Fastening for Casters, Knobs, &.c.' I IN0 |62I433 PatentedApril20,1875. I V

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THE GRAPHIC CO.PHGTO:-LITH.39 8:41 PARK PLAGE,N.Y.

UNITED STATES- PATENT OFFICE.

JACOB THINNES, FREDRIOK THINNES, AND CHARLES SOHUELER, OF BROOKLYN, NEWYORK.

IMPROVEMENT IN FASTENINGS FOR CASTERS,'KNOBS, &c.

Specification forming part of Letters Patent No. 162,433, dated April20, 1875; application filed March 19, 1875.

To all whom it may concern Be it known that we, J AooB THINNEs, FRED-RICK THINNES, and GHARLEs SCHUELER, of Brooklyn, in the county of Kingsand State of NewYork, have invented certain new and useful Improvementsin Fastenings for Casters, Knobs, 850.; and we do hereby declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it pertains tomake and use it, reference being had to the accompanying drawings, whichform part of this specification.

Our invention relates to an improvement in fastenin gs for casters,knobs, &c.; and it consists in making them self-fastening by means of aconical or bulbous head, which is drawn into an outward-yieldin gsocket, the outer sides of which are provided with suitable patches orprojections, that are pressed into the surrounding substance and holdthe screw in position, as will be more fully described hereafter.

The accompanying drawing represents our invention.

a represents a screw-rod, having its upper end suitably enlarged into ahead, b. This rod is passed down through a sleeve or socket, 0, so thatits lower threaded end may receive a nut, by means of which nut the rodmay be drawn downward into the sleeve or socket to any desired extent.The top edges of the sleeve are slit from the top down to within a shortdistance from the flange (Z, so that when the head b enters the socketand is drawn downward the slits open and the sides of the sleeves arepressed outward. On the upper ends of the slit portions of the sleevesare catches or projections f, which, when the head forces the upper endof the socket outward, are pressed into the surrounding substance,thereby preventing the sleeve and its attachment from being drawn out.

In order to apply this self-fastenin g screw,

it is only necessary to make a hole large and deep enough for the head band sleeve 0 to enter as far as the flange (Z. By means of nut g, placedupon the lower end of the screw, the head is drawn down into the socket,its sides forced outward, and held in position by the catches f.

If desired to remove the screw, it is only necessary to loosen the nut,push the screw upward, and, the catches losing their hold, the sleeveand screw may be drawn out without difficulty.

- If applied to casters, as shown in Figures 1 and 2, this screw is ofgreat service, as it dispenses entirely with screws to fasten thecasters to the legs of furniture, so that any housekeeper inay remove orchange casters when desired without the assistance of a skilled Workman.

This screw may also be applied for any other purpose where aself-fastening device is useful, and where two objects are to be drawntogether.

Having thus described our invention, we claim- The combination of therod to, screw-threaded at one end, and having a bulbous or enlargedhead, I), at the other, slit sleeve 0, catches or projections f, flanged, and nutscrew g, for attaching and fastening the framework ofa'furnitiu'e-caster, for fastening knobs, or other analogous uses, allsubstantially as described and shown, for the purposes set forth.

In testimony that we claim the foregoing we have hereunto set our handsthis 21st day of January, 1875.

JACOB THINNES. FREDRIOK THINN ES. CHARLES SOHUELER.

Witnesses:

S. J. EDWARDS, WM. E. HUsTnD.

